Evaluating charpy impact signals using power spectrum densities: A finite element method approach

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9 Citations (Scopus)

Abstract

Dynamic fracture properties of most engineering materials are generally assessed using the charpy test. The dynamic responses of the standard charpy impact machine are studied by running experiments using strain gauges and a specific data acquisition system in order to obtain the impact response and for this reason, the numerical analysis by means of the finite element method has been used to obtain the findings. In addition, the non-linear dynamic finite element is used for simulating the charpy impact test. The charpy test modelling was used in order to obtain the strain on the striker during the test. Two different velocities (5.18 m/s and 3.35 m/s) which are similar to the instrument charpy impact machine with the standard charpy modelling from the aluminium 6061 and low carbon steel 1050 as the rim material were used. A power spectrum density (PSD) is used to convert a signal from the time domain to the frequency domain using the fast Fourier transform (FFT) method. Related parameters of different materials, different velocities, energy absorbed, strain signals, PSD and the relationship between all the parameters were finally correlated and discussed. It was found that the modulus elasticity of materials and velocities were proportional to the energy absorbed, strain signals and PSD during the impact simulation.

Original languageEnglish
Pages (from-to)92-101
Number of pages10
JournalInternational Journal of Mechanical and Materials Engineering
Volume6
Issue number1
Publication statusPublished - 2011

Fingerprint

Power spectrum
Finite element method
Strain energy
Low carbon steel
Strain gages
Aluminum
Fast Fourier transforms
Dynamic response
Numerical analysis
Elasticity
Data acquisition
Experiments

Keywords

  • Charpy Impact
  • FEA
  • Material
  • PSD
  • Signal

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

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abstract = "Dynamic fracture properties of most engineering materials are generally assessed using the charpy test. The dynamic responses of the standard charpy impact machine are studied by running experiments using strain gauges and a specific data acquisition system in order to obtain the impact response and for this reason, the numerical analysis by means of the finite element method has been used to obtain the findings. In addition, the non-linear dynamic finite element is used for simulating the charpy impact test. The charpy test modelling was used in order to obtain the strain on the striker during the test. Two different velocities (5.18 m/s and 3.35 m/s) which are similar to the instrument charpy impact machine with the standard charpy modelling from the aluminium 6061 and low carbon steel 1050 as the rim material were used. A power spectrum density (PSD) is used to convert a signal from the time domain to the frequency domain using the fast Fourier transform (FFT) method. Related parameters of different materials, different velocities, energy absorbed, strain signals, PSD and the relationship between all the parameters were finally correlated and discussed. It was found that the modulus elasticity of materials and velocities were proportional to the energy absorbed, strain signals and PSD during the impact simulation.",
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AU - Mohammad, M.

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AB - Dynamic fracture properties of most engineering materials are generally assessed using the charpy test. The dynamic responses of the standard charpy impact machine are studied by running experiments using strain gauges and a specific data acquisition system in order to obtain the impact response and for this reason, the numerical analysis by means of the finite element method has been used to obtain the findings. In addition, the non-linear dynamic finite element is used for simulating the charpy impact test. The charpy test modelling was used in order to obtain the strain on the striker during the test. Two different velocities (5.18 m/s and 3.35 m/s) which are similar to the instrument charpy impact machine with the standard charpy modelling from the aluminium 6061 and low carbon steel 1050 as the rim material were used. A power spectrum density (PSD) is used to convert a signal from the time domain to the frequency domain using the fast Fourier transform (FFT) method. Related parameters of different materials, different velocities, energy absorbed, strain signals, PSD and the relationship between all the parameters were finally correlated and discussed. It was found that the modulus elasticity of materials and velocities were proportional to the energy absorbed, strain signals and PSD during the impact simulation.

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